#!/usr/bin/env bash

#

# Edits labels on a GitHub issue.

# Usage: ./scripts/edit-issue-labels.sh --add-label bug --add-label needs-triage --remove-label untriaged

#

# The issue number is read from the workflow event payload.

#

set -euo pipefail

# Read from event payload so the issue number is bound to the triggering event

ISSUE=$(jq -r '.issue.number // empty' "${GITHUB_EVENT_PATH:?GITHUB_EVENT_PATH not set}")

if ! [[ "$ISSUE" =~ ^[0-9]+$ ]]; then

echo "Error: no issue number in event payload" >&2

exit 1

fi

ADD_LABELS=()

REMOVE_LABELS=()

# Parse arguments

while [[ $# -gt 0 ]]; do

case $1 in

--add-label)

ADD_LABELS+=("$2")

shift 2

;;

--remove-label)

REMOVE_LABELS+=("$2")

shift 2

;;

*)

echo "Error: unknown argument (only --add-label and --remove-label are accepted)" >&2

exit 1

;;

esac

done

if [[ ${#ADD_LABELS[@]} -eq 0 && ${#REMOVE_LABELS[@]} -eq 0 ]]; then

exit 1

fi

# Fetch valid labels from the repo

VALID_LABELS=$(gh label list --limit 500 --json name --jq '.[].name')

# Filter to only labels that exist in the repo

FILTERED_ADD=()

for label in "${ADD_LABELS[@]}"; do

if echo "$VALID_LABELS" | grep -qxF "$label"; then

FILTERED_ADD+=("$label")

fi

done

FILTERED_REMOVE=()

for label in "${REMOVE_LABELS[@]}"; do

if echo "$VALID_LABELS" | grep -qxF "$label"; then

FILTERED_REMOVE+=("$label")

fi

done

if [[ ${#FILTERED_ADD[@]} -eq 0 && ${#FILTERED_REMOVE[@]} -eq 0 ]]; then

exit 0

fi

# Build gh command arguments

GH_ARGS=("issue" "edit" "$ISSUE")

for label in "${FILTERED_ADD[@]}"; do

GH_ARGS+=("--add-label" "$label")

done

for label in "${FILTERED_REMOVE[@]}"; do

GH_ARGS+=("--remove-label" "$label")

done

gh "${GH_ARGS[@]}"

if [[ ${#FILTERED_ADD[@]} -gt 0 ]]; then

echo "Added: ${FILTERED_ADD[*]}"

fi

if [[ ${#FILTERED_REMOVE[@]} -gt 0 ]]; then

echo "Removed: ${FILTERED_REMOVE[*]}"

fi